Roof rack



FIG. 1 is a perspective view of a roof rack, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an in-use image of the roof rack on a van.

The dashed line showings, including those of the central platform, form no part of the claimed design. 

CLAIM I claim the ornamental design for a roof rack, as shown and described. 